How to Use the Zippopotam.us MCP in OpenAI Agents SDK

Q: Can I use lookupnearbycity with OpenAI Agents SDK?

Absolutely. The lookupnearbycity tool lets you find all zip codes associated with a given city name. This is crucial when your agent needs to define the scope of its search area.

Location data for production agents using the OpenAI Agents SDK.

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Connect Zippopotam.us MCP to OpenAI Agents SDK

Create your Vinkius account to connect Zippopotam.us to OpenAI Agents SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Zippopotam.us with OpenAI Agents SDK

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Perplexity

Look up zip codes by city name.

The `lookup_nearby_city` tool finds all associated zip codes when you pass in a major metropolitan area. This is perfect for your agent's initial planning phase, letting it define the scope of work based on geography. Your production agent uses this data to narrow down target areas before executing complex tasks. It ensures that every action taken by the system is tied back to a specific, validated geographical zone.

Get coordinates from postal codes.

When your agent runs `lookup_postcode`, you get structured data including state, city, and precise coordinates. This eliminates guesswork; it tells you exactly where the location is on a map. This functionality lets specialized agents perform tasks like routing or proximity checks immediately after fetching the code. It's core geographic intelligence for your deployed system.

Reliable geo-data sourcing via MCP Server.

The OpenAI Agents SDK integrates with Zippopotam.us to manage location data requests, making sure your agent always accesses current postal information through a controlled endpoint. This pattern allows you to build robust workflows where the AI client doesn't just guess; it executes a validated call against an external source of truth. The built-in guardrails keep everything contained and traceable.

Setup guide

Set up Zippopotam.us MCP in OpenAI Agents SDK

Prerequisites

Python 3.10+ installed
openai-agents package (pip install openai-agents)
Active Vinkius subscription with a valid endpoint token

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all Zippopotam.us tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives Zippopotam.us tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate Zippopotam.us tools and returns structured results. Copy the full example on the right to get started.

agent.py

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerSse

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="Zippopotam.us Agent",
            instructions="You have access to Zippopotam.us tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Common questions about Zippopotam.us MCP in OpenAI Agents SDK

The OpenAI Agents SDK auto-discovers the available tools from the MCP Server, letting your agent call location lookups without any extra config code. You just pass the server endpoint and let the system handle the rest.

Absolutely. The `lookup_nearby_city` tool lets you find all zip codes associated with a given city name. This is crucial when your agent needs to define the scope of its search area.

It provides detailed geographic data, including coordinates and state information. When you use `lookup_postcode`, your agent gets a clean object containing all this necessary postal intelligence.

Yeah, you should. By connecting the MCP Server through the SDK, your agent gets not just the data, but a secure, traceable execution path for every lookup.

This MCP Server handles global postal code intelligence, specifically dealing with zip codes, city names, states, and geographical coordinates (latitude/longitude).

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